What does the term personal values mean and where do they come from ?

what they mean:

Personal values are the things that are important to us, the characteristics and behaviours that motivate us and guide our decisions. For example, maybe you value honesty. You believe in being honest wherever possible and you think it's important to say what you really think.

where they come from:

The principles and standards upon which we lead our lives. They are influenced by our beliefs, our background, education, and our individual and wider social networks. Some of our personal ideas can originate from prejudice, myths and assumptions.

c. nature verses humanity is correct

i am also pretty sure it is c